Spark plug pipes - an essential part of the ignition system
The spark plug cap pipe is a small but extremely important part of the ignition system on a motorcycle or scooter. Its task is to conduct high-voltage current from the ignition source to the spark plug, thus ensuring proper spark and trouble-free engine firing.
Spark plug pipe construction
Spark plug pipes come in a variety of designs, but their basic components are common:
- Body: Made of plastic or metal, it insulates the high-voltage current and protects the internal components from mechanical damage.
- Insulator: Placed inside the body, it provides electrical insulation and prevents the current from breaking through to ground.
- Contacts: They are located at both ends of the pipe. The upper contact connects to the ignition source (ignition coil), and the lower contact connects to the center electrode of the spark plug.
- Gasket: Ensures the tightness of the connection and protects against the ingress of moisture and dirt.
What to look for when buying a spark plug cap pipe:
- Resistor: Used to suppress electromagnetic interference (EMI).
- Bend angle: Straight pipes are available, as well as those with a bend angle of 90°, 102° or 120°. This angle makes it easier to install the pipe depending on the engine design.
- Additional safety features: Waterproofing (designation "P", "K"), rubber cover (designations "M"), compact design (designation "H").
Selecting the right spark plug cap pipe
Choosing the right spark plug cap pipe is crucial for proper engine operation. The following factors should be taken into account:
- Connector type: Make sure the spark plug has an SAE connector or a threaded M4 stem. Spark plugs have an SAE connector that is permanently mounted or screwed onto an M4 pin, and are also sold with an M4 pin only - no SAE connector included.
- Bend angle: Match the bend angle of the pipe to facilitate installation and ensure proper connection to the spark plug.
- Additional features: Pay attention to additional features of the pipe, such as waterproofing, rubber cover or compact design, which may be important depending on the conditions of use of the motorcycle or scooter.
How do I choose the right spark plug cap pipe for my motorcycle or scooter?
To select the right spark plug cap pipe for your motorcycle or scooter, you need to:
- Identify the model of your motorcycle or scooter.
- Know the type of spark plug used on the vehicle.
- Select a pipe with the correct type of connector and bending angle.
- Note additional features of the pipe that may be relevant to the application.
Remember that using the right spark plug cap pipe is crucial for proper engine operation, performance and life.